inform ETR EVO Series, Installation And Operating Manual

Page: 38 / 72

ETR EVO UPS User Manual (Ver. 1.0) Page 33
5.5. Manual Bypass Operation
Manual Bypass enables the user to isolate the electronic circuitry of the UPS from the mains and the
load without interrupting the load operation by connecting the loads directly to the bypass utility
supply. This feature is useful while performing maintenance or service and should only be executed
by authorized technical service personnel.
This procedure may only be executed by authorized Technical Service personnel.
Some parts inside the UPS (terminals, EMC filters and measurement circuits) are still
energized during Maintenance Bypass Operation. In order to deenergize all UPS parts, circuit
breakers on mains and bypass mains distribution panels feeding the UPS and circuit breakers
on external battery cabinet shall be brought to “OFF” position. Internal batteries should also
be isolated from the system.
During Manual Bypass operation; in case of any mains interruption occurs, all loads
on the
output will be deenergized. Manual Bypass Operation should not be preferred for
long time
use.